mirror of
https://github.com/openssl/openssl.git
synced 2024-11-27 05:21:51 +08:00
249 lines
6.9 KiB
C
249 lines
6.9 KiB
C
/*
|
|
* Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*/
|
|
|
|
#include <openssl/opensslconf.h>
|
|
#ifdef OPENSSL_NO_EGD
|
|
NON_EMPTY_TRANSLATION_UNIT
|
|
#else
|
|
|
|
# include <openssl/crypto.h>
|
|
# include <openssl/e_os2.h>
|
|
# include <openssl/rand.h>
|
|
|
|
/*-
|
|
* Query the EGD <URL: http://www.lothar.com/tech/crypto/>.
|
|
*
|
|
* This module supplies three routines:
|
|
*
|
|
* RAND_query_egd_bytes(path, buf, bytes)
|
|
* will actually query "bytes" bytes of entropy form the egd-socket located
|
|
* at path and will write them to buf (if supplied) or will directly feed
|
|
* it to RAND_seed() if buf==NULL.
|
|
* The number of bytes is not limited by the maximum chunk size of EGD,
|
|
* which is 255 bytes. If more than 255 bytes are wanted, several chunks
|
|
* of entropy bytes are requested. The connection is left open until the
|
|
* query is competed.
|
|
* RAND_query_egd_bytes() returns with
|
|
* -1 if an error occurred during connection or communication.
|
|
* num the number of bytes read from the EGD socket. This number is either
|
|
* the number of bytes requested or smaller, if the EGD pool is
|
|
* drained and the daemon signals that the pool is empty.
|
|
* This routine does not touch any RAND_status(). This is necessary, since
|
|
* PRNG functions may call it during initialization.
|
|
*
|
|
* RAND_egd_bytes(path, bytes) will query "bytes" bytes and have them
|
|
* used to seed the PRNG.
|
|
* RAND_egd_bytes() is a wrapper for RAND_query_egd_bytes() with buf=NULL.
|
|
* Unlike RAND_query_egd_bytes(), RAND_status() is used to test the
|
|
* seed status so that the return value can reflect the seed state:
|
|
* -1 if an error occurred during connection or communication _or_
|
|
* if the PRNG has still not received the required seeding.
|
|
* num the number of bytes read from the EGD socket. This number is either
|
|
* the number of bytes requested or smaller, if the EGD pool is
|
|
* drained and the daemon signals that the pool is empty.
|
|
*
|
|
* RAND_egd(path) will query 255 bytes and use the bytes retreived to seed
|
|
* the PRNG.
|
|
* RAND_egd() is a wrapper for RAND_egd_bytes() with numbytes=255.
|
|
*/
|
|
|
|
# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_VMS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_VXWORKS) || defined(OPENSSL_SYS_VOS) || defined(OPENSSL_SYS_UEFI)
|
|
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
|
|
{
|
|
return (-1);
|
|
}
|
|
|
|
int RAND_egd(const char *path)
|
|
{
|
|
return (-1);
|
|
}
|
|
|
|
int RAND_egd_bytes(const char *path, int bytes)
|
|
{
|
|
return (-1);
|
|
}
|
|
# else
|
|
# include <openssl/opensslconf.h>
|
|
# include OPENSSL_UNISTD
|
|
# include <stddef.h>
|
|
# include <sys/types.h>
|
|
# include <sys/socket.h>
|
|
# ifndef NO_SYS_UN_H
|
|
# ifdef OPENSSL_SYS_VXWORKS
|
|
# include <streams/un.h>
|
|
# else
|
|
# include <sys/un.h>
|
|
# endif
|
|
# else
|
|
struct sockaddr_un {
|
|
short sun_family; /* AF_UNIX */
|
|
char sun_path[108]; /* path name (gag) */
|
|
};
|
|
# endif /* NO_SYS_UN_H */
|
|
# include <string.h>
|
|
# include <errno.h>
|
|
|
|
int RAND_query_egd_bytes(const char *path, unsigned char *buf, int bytes)
|
|
{
|
|
int ret = 0;
|
|
struct sockaddr_un addr;
|
|
int len, num, numbytes;
|
|
int fd = -1;
|
|
int success;
|
|
unsigned char egdbuf[2], tempbuf[255], *retrievebuf;
|
|
|
|
memset(&addr, 0, sizeof(addr));
|
|
addr.sun_family = AF_UNIX;
|
|
if (strlen(path) >= sizeof(addr.sun_path))
|
|
return (-1);
|
|
OPENSSL_strlcpy(addr.sun_path, path, sizeof addr.sun_path);
|
|
len = offsetof(struct sockaddr_un, sun_path) + strlen(path);
|
|
fd = socket(AF_UNIX, SOCK_STREAM, 0);
|
|
if (fd == -1)
|
|
return (-1);
|
|
success = 0;
|
|
while (!success) {
|
|
if (connect(fd, (struct sockaddr *)&addr, len) == 0)
|
|
success = 1;
|
|
else {
|
|
switch (errno) {
|
|
# ifdef EINTR
|
|
case EINTR:
|
|
# endif
|
|
# ifdef EAGAIN
|
|
case EAGAIN:
|
|
# endif
|
|
# ifdef EINPROGRESS
|
|
case EINPROGRESS:
|
|
# endif
|
|
# ifdef EALREADY
|
|
case EALREADY:
|
|
# endif
|
|
/* No error, try again */
|
|
break;
|
|
# ifdef EISCONN
|
|
case EISCONN:
|
|
success = 1;
|
|
break;
|
|
# endif
|
|
default:
|
|
goto err; /* failure */
|
|
}
|
|
}
|
|
}
|
|
|
|
while (bytes > 0) {
|
|
egdbuf[0] = 1;
|
|
egdbuf[1] = bytes < 255 ? bytes : 255;
|
|
numbytes = 0;
|
|
while (numbytes != 2) {
|
|
num = write(fd, egdbuf + numbytes, 2 - numbytes);
|
|
if (num >= 0)
|
|
numbytes += num;
|
|
else {
|
|
switch (errno) {
|
|
# ifdef EINTR
|
|
case EINTR:
|
|
# endif
|
|
# ifdef EAGAIN
|
|
case EAGAIN:
|
|
# endif
|
|
/* No error, try again */
|
|
break;
|
|
default:
|
|
ret = -1;
|
|
goto err; /* failure */
|
|
}
|
|
}
|
|
}
|
|
numbytes = 0;
|
|
while (numbytes != 1) {
|
|
num = read(fd, egdbuf, 1);
|
|
if (num == 0)
|
|
goto err; /* descriptor closed */
|
|
else if (num > 0)
|
|
numbytes += num;
|
|
else {
|
|
switch (errno) {
|
|
# ifdef EINTR
|
|
case EINTR:
|
|
# endif
|
|
# ifdef EAGAIN
|
|
case EAGAIN:
|
|
# endif
|
|
/* No error, try again */
|
|
break;
|
|
default:
|
|
ret = -1;
|
|
goto err; /* failure */
|
|
}
|
|
}
|
|
}
|
|
if (egdbuf[0] == 0)
|
|
goto err;
|
|
if (buf)
|
|
retrievebuf = buf + ret;
|
|
else
|
|
retrievebuf = tempbuf;
|
|
numbytes = 0;
|
|
while (numbytes != egdbuf[0]) {
|
|
num = read(fd, retrievebuf + numbytes, egdbuf[0] - numbytes);
|
|
if (num == 0)
|
|
goto err; /* descriptor closed */
|
|
else if (num > 0)
|
|
numbytes += num;
|
|
else {
|
|
switch (errno) {
|
|
# ifdef EINTR
|
|
case EINTR:
|
|
# endif
|
|
# ifdef EAGAIN
|
|
case EAGAIN:
|
|
# endif
|
|
/* No error, try again */
|
|
break;
|
|
default:
|
|
ret = -1;
|
|
goto err; /* failure */
|
|
}
|
|
}
|
|
}
|
|
ret += egdbuf[0];
|
|
bytes -= egdbuf[0];
|
|
if (!buf)
|
|
RAND_seed(tempbuf, egdbuf[0]);
|
|
}
|
|
err:
|
|
if (fd != -1)
|
|
close(fd);
|
|
return (ret);
|
|
}
|
|
|
|
int RAND_egd_bytes(const char *path, int bytes)
|
|
{
|
|
int num, ret = 0;
|
|
|
|
num = RAND_query_egd_bytes(path, NULL, bytes);
|
|
if (num < 1)
|
|
goto err;
|
|
if (RAND_status() == 1)
|
|
ret = num;
|
|
err:
|
|
return (ret);
|
|
}
|
|
|
|
int RAND_egd(const char *path)
|
|
{
|
|
return (RAND_egd_bytes(path, 255));
|
|
}
|
|
|
|
# endif
|
|
|
|
#endif
|